no. 1834. NEW SPECIES OF STREPSIPTERA— PIERCE. 489 



The wasps were collected between November 20 and 30 and shipped 

 to Dallas, Texas. Twenty-three wasps arrived dead, of which 



9 were unparasitized. 

 7 contained one parasite. 



1 contained two parasites. 



4 contained three parasites. 



2 contained four parasites. 



Nine of the dead wasps contained empty male puparia, but none 

 of them contained living male puparia. 



The living wasps were fed sugared water. Of the 20 living unpara- 

 sitized wasps only 6 lived until April 6, 1910, and the average length 

 of life in captivity was 90 days. The parasitized wasps lived as 

 follows : 



1 wasp with 3 females, 1 male exuvium , lived 9 days. 



3 wasps with 1 female, 1 male exuvium each, averaged 9 days. 



1 wasp with 1 male exuvium , lived 11 days. 



3 wasps with 1 female, 1 male pupa each, averaged 17 days. 



4 wasps with 2 females each , averaged 26 days. 

 3 wasps with 3 females each , averaged 39 days. 



2 wasps with 1 female each , averaged 62 days. 

 1 wasp with 1 male pupa , lived 84 days. 



The maximum record was one wasp with 1 female, 125 days. 



EFFECTS OE PARASITISM ON HOST. 



In connection with the deformity of Leionotus annulatus (Bull. 66, 

 p. 31) caused by parasitism it is interesting to note the occurrence of 

 similar phenomena in Polistes metricus without the apparent inter- 

 vention of parasitism (Wheeler, 1910, p. 389). 



Wheeler (1910) finds very few external alterations in parasitized 

 Polistes metricus. 



On page 34 of Bulletin 66 several records of copulation of parasitized 

 hosts are presented. To these Robertson (1910) has added the 

 observation of copulation of two stylopized Andrena salictaria Rob- 

 ertson, of a parasitized female Parandrcna andrenoides Cresson, and 

 of a parasitized male Pseudopanurgus rudbechiae Roberston. 



The list of Andrenidse occasionally lacking the second transverse 

 cubital vein (Bull. 66, p. 35) should have been credited to Robertson, 

 with but one exception. Robertson (1910) lists 18 species of Andrena, 

 and 17 other species of Hymenoptera in winch this abnormality is 

 known to occur and states that he does not think the absence of this 

 vein indicates parasitism or is a result of it. The list was presented 

 in the Bulletin because it suggested some connection, and, in fact, 

 the matter is still an open question. 



BIOLOGY OF THE PARASITE. 



TRIOZOCERA TEXANA Pierce. 



The occurrence of this species at light at Victoria, Texas, July 4, 

 1908, is of interest. 



